TM 9-2320-387-24-l REFERENCE INFORMATION If STUICE-R is not available, accelerate under full power to .a safe and reasonable speed on a level surface. For STUICE-R test 12. a number higher than 6.700 is passing. For test 13. a number higher than 75 is passing. I I It is normal for the engine to emit some black smoke when accelerating after idling for a while. Under most other conditions, exhaust smoke is usually from one of three sources; BLUE smoke is usually oil. BLACK smoke is too much fuel or too little air (often caused by advanced injection timing). WHITE smoke is usually water (often caused by retarded injection timing). If the smoking is continuous or appears under a particular condition, the smoke probably indicates a problem and should be investigated. If STEXE-R is not available, there is no easy way to test compression. In this case, go on to the next step but remember that compression may be a problem. ENGINE RUNNING ENGINE POWER TEST (PERCENT) STMCE-R TEST 13 1. Set TEST SELECT switches to 13. 2. Press and release TEST button. 3. Wait for prompting message CIP to appear. 4. When CIP appears on display, press down sharply on engine accelerator and hold it to the floor. When VIM displays OFF. release accelerator. 5. A number will be displayed after the engine has returned to idle speed. This number is the test result in units of percent of nominal rated power. ENGINE POWER TEST (RPM/SEC) STMCE-R TEST 12 1. Set TEST SELECT switches to 12. 2. Press and release TEST button. 3. Wait for prompting message CIP to appear. 4. When CIP appears on display, press down sharply on engine accelerator and hold it to the floor. When VTM displays a number, release accelerator. 5. A number will be displayed after the engine has returned to idle speed. This number is the test result in units of rpm per second. . COMPRESSION UNBALANCE STUICE-R TEST 14 I 1. Run tests 72,73, and 74 to verify that the batteries are ok. 2. THE GLOW PLUG CONTROLLER AND THE CONTROL VALVE ELECTRICAL CONNECTOR MUST BE DISCONNECTED PRIOR TO RUNNING THIS TEST. 3. Disconnect wire 64A at injection pump to prevent starting. 4. Disconnect glow plug controller and control valve electrical connector (to keep waveformclean). 6. Start Test 14. compression unbalance. 6. Wait for the GO message. Crank the engine. 7. Release the rotary switch when the VTM displays OFF. A number less than 25% is passing. 2-57